DOI: 10.1016/j.watres.2018.11.037
Scopus记录号: 2-s2.0-85057443053
论文题名: Study of the long-term impacts of treatments on lead release from full and partially replaced harvested lead service lines
作者: Doré E. ; Deshommes E. ; Laroche L. ; Nour S. ; Prévost M.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 566
结束页码: 577
语种: 英语
英文关键词: Corrosion control
; CSMR
; Drinking water
; Lead service line
; Orthophosphate
; Partial lead service line replacement
Scopus关键词: Chlorine compounds
; Copper corrosion
; Corrosive effects
; Galvanic corrosion
; Pipeline corrosion
; Pollution
; Potable water
; Sulfur compounds
; Chloride-to-sulfate mass ratios
; Corrosion control
; CSMR
; Distribution systems
; Long-term impacts
; Orthophosphate
; Pb concentration
; Service line
; Lead compounds
; chloride
; copper
; lead
; phosphate
; sulfate
; concentration (composition)
; corrosion
; corrosion control
; distribution system
; drinking water
; lead
; orthophosphate
; Article
; corrosion
; household
; pH
; priority journal
; surface area
; Canada
; Montreal
; Quebec [Canada]
英文摘要: Long-term (155 weeks) Pb concentrations, following partial lead service lines replacements (PLSLR), were measured in a flow through pilot made of harvested lead service lines (LSL) from the distribution system of the City of Montreal. The present study also investigates how release of Pb from full and partial LSLs is influenced by: pipe diameter, decrease in chloride-to-sulfate mass ratio (CSMR) from 0.9 to 0.3, addition of orthophosphate (1 mg P/L), and increase in pH to 8.3. Pb concentrations were measured after 16 h of stagnation and under flow conditions. In this study, Pb concentrations did not decrease, in the long term, after partial LSL replacement. Moreover, the most effective corrosion control treatment in full LSLs was the addition of orthoP. In contrast, the decrease of the CSMR best reduced lead release from partial LSLs. The impact of pipe configuration therefore influenced the effectiveness of corrosion control treatments. It is noteworthy that the increase in Pb concentrations following PLSLR were attributed to particulate Pb release from the galvanic section of the pipe. The occurrence of galvanic corrosion, caused by the connection between Pb and copper pipes, adds a new source of Pb in the partial LSL. At least, this new source of lead has to be offset by the removal of a long enough section of LSL during PLSLR. Full LSL replacements may be warranted to minimize the exposure of consumers to elevated Pb levels caused by galvanic corrosion in LSLs. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122126
Appears in Collections: 气候变化事实与影响
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作者单位: NSERC Industrial Chair on Drinking Water, Department of Civil, Mining and Geological Engineering, Polytechnique Montréal, Montréal, QC, Canada; Ville de Montréal, Technical Expertise Division, Montréal, Canada
Recommended Citation:
Doré E.,Deshommes E.,Laroche L.,et al. Study of the long-term impacts of treatments on lead release from full and partially replaced harvested lead service lines[J]. Water Research,2019-01-01